The OR (95% CI) for ALT elevation in age, male sex, BMI SDS, protein intake, and MetS were 1.08 (1.03–1.14), 2.73 (2.10–3.54), 2.35 (2.11–2.61), 1.05 (1.02–1.08), and 8.91 (5.16–15.38). This evidence concerns the gene GPT and metabolic syndrome.